She too had been from his youth the wise adviser of her step-son, but she was deeply grieved at the fate of Oldenbarneveldt, and after his execution left the Netherlands to take up her residence in her native country.

By the death of William Lewis the two stadholderates of Groningen with Drente and of Friesland became vacant.

Maurice succeeded to that of Groningen, but the Frieslanders remained faithful to the house of Nassau-Siegen and elected Ernest Casimir, the younger brother of William Lewis, as their stadholder.
* * * * *.